For developers, we have an API (http://swiftype.com/documentation/quickstart) that is not much different than setting up Solr or ElasticSearch. However, you no longer need to manage the search servers. We handle reliablity and scaling. On top of that, we offer client libraries (like SwiftypeTouch), search analytics, and a management dashboard (think: you write the search, the business people take over managing the results).

For less technical users, we have a web crawler with automates the creation of search engines. Combined with our crawler controls and meta tags (http://swiftype.com/documentation/meta_tags) you can build a really powerful site search engine with little effort.